Version: 1.0

Posted: 2003-01-14

Build Requirements: N/A

Runtime Requirements: Mac OS X Mac OS X

View Source Code:

Download Sample (“CocoaVideoFrameToNSImage.zip”, 293.5K)
Download Sample (“CocoaVideoFrameToNSImage.dmg”, 348.3K)


Description

This sample demonstrates how to step frame-by-frame through a QuickTime movie using the GetNextInterestingTime function, drawing each frame of the movie into a GWorld using a decompression sequence. The contents of the GWorld are then converted into a NSImage object. Finally, the NSImage is composited with a background image and drawn into a NSQuickDrawView using the NSImage drawRect method. Simply launch the application, and press the "NextFrame" button to advance frame-by-frame through the movie (note: for MPEG-4 movies the above technique will work, but not MPEG-1 or 2 because with these movie files all frames are treated as a single large sample in the movie). Requirements: Mac OS X Keywords: NSQuickDrawView NSImage GetNextInterestingTime video frame step

Document Revision History

Date Notes
2003-01-14Demonstrates how to create an NSImage for each frame of a QuickTime movie.

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